The Sennheiser CX 280 is a mid-range pair of in-ear headphones, released in early 2010. These headphones feature ergonomic ear pieces along with dynamic left and right speakers. A volume control is built into the CX 280s, in addition to a customizable cable slider also found on the cord traveling to the user’s music playback device. In comparison to the higher-end Sennheiser CX 880s, this pair has a smaller dynamic frequency and an elongated earpiece design.

With a frequency response range of 19 - 20500 Hz, expert reviews have indicated that a variety of music genres can be played on these headphones without negative effect. The volume slider has a simple up/down movement capacity, while the cable clip can shorten or lengthen the cord at the user’s will. Sennheiser includes a case and 3 different sizes of ear pieces.